Boiler



J. A. HAFER BOILER BLOWER Aug. ll, 1925.

Filed Jan- 16, 1920 2 Sheets-Sheet Patented Aug. 1l, 1925.

UNV'ED STATES JAMES A. HAFER, 09F CHAMBERSBURG, PENNSYLVANIA.

Borana BLOWER.

Application led January 16, 1920. Serial No. 351,940.

To all whom t may concern:

Be it known that l, JAMES A. HAFER, a citizen of the United States, residing at Chambersburg, in the county of Franklin and State of Pennsylvania, have invented certain new and useful lmrirovements in Boiler Blowers; and I, do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled `in the art to which it appertains to make and use the same.

The present invention relates to boiler blowers of that t-ype wherein a `fluid under pressure is used for cleaning out the flues of the boiler.

The object is to provide a boiler blower of that type wherein a pivoted or swinging larm is employed for traversing the ends of the boiler flues to project fluid under pressure in separate streams int-o the fines, and to provide a structure wherein the pivotal mounting of the swinging arm is effectually sealed and mounted vfor easy rotation.

Another object is to provide an improved mounting for the boiler blower which may be swung into and out of position with relative ease and which when in position may be locked securely.

lVith these and other objects in view as will in part hereinafter become apparent and in part be stated, the invention comprises certainnovel constructions, combinations and arrangements of parts as subsequently specified and claimed.

In the accompanying drawings,-v

Figure 1 is a fragmentary front elevation of a boiler having the blower of this invention applied thereto.

Figure 2 is a fragmentary, side elevation of the same.

Figure 3 is an enlarged, longitudinal section taken through the pivotal mounting of the boiler blower.

`Figure 4 is a top plan view of the same, parts being broken away.

Figure 5 is a transverse section taken substantially on the line 5-5 of Figure 3, half of the view being shown in end elevation.

Figure 6 is a detail, enlarged, perspective view of the hub of the pivoted arm showing the fluid inlet ports in the peripheral wall of the hub.

Figure 7 is a top edge view of the blower support in closed or operative position, the

dotted lines showing the latch swung into released position.

Figure 8 is an end view of the bracket or support, looking at the latch end of the support;

Figu-re y 9 is a transverse section taken on the line 9-9 of Figure 7.

Referring to the drawings by numerals, 10 designates a conventional form of boiler having the tubes or flues 11 which are adapted to be cleansed by the blowing of fluid under pressurerinto the forward ends of the flues. The boiler 10 is mounted in any suitable furnace structure and as shown in Figure 2 the furnace is provided with a front wall 12, conventionally shown in spaced relation frointhe front end of the boiler 10. The boiler blower of this invention is adapted to be supported entirely upon the front wall 12. The front wall 12 is provided at either side of the boiler 10 with straps 13 and 14 constituting supporting members for a bracket adapted to eX- tend across the front wall 12 in front of the boiler. The strap 13 is provided with a pintle 15 connecting a plate 16 to the strap 13 and permitting the swinging of the plate .16 about the pintle. The plate 16 is pr-ovided with a longitudinally extending slot 17 adapted to receive one or more clamping bolts 18 therethrough which engage in a longitudinal slot 19y formed in an angle iron 20, which is adjustablyvclamped at its vertical flange against the plate 16. The angle iron 20 carries a( second plate 21 having a longitudinal slot 22 therein to receive asecond pair of clamping bolts 23, the latter also engaging in the longitudinal slot 19 of the angle iron 20. The plates 16 and 21 may thus be adjusted toward and from each other upon the angle iron 2O to accommo` date the bracket to boilers of different widths. The strap 14 is provided with a shoulder or rest 24 which is of substantially l`shape and which has the branches thereof extending from opposite sides of the strap and curved downwardly to provide a cammed lift-ing surface over which the free end portion of the plate 21 is adapted to ride when the bracket is swung into open and closed positions. The strap 14 is also provided with a flat ledge 25 arranged inwardly of the rest 24 and upon which is movably mounted a latch plate 2 6 secured in position by a bolt or pin 27. The latch plate 26 is provided with a recess 28 in its outer end of suflicient width and depth to embrace the outer edge portion of the plate 21, and the latch plate 26 is held in retaining position by a removable pin or bolt 29 which passes downwardly through an opening in the latch plate and a registering opening in the ledge 25.

The boiler blower is mounted on the horizontal flange of the angle iron 2O and is providedA with a base plate 30 secured to the angle iron 20, intermediate its ends, by bolts 31 or the like, and having formelL therein a pair of suitably spaced-apart slots 32 which extend longitudinally in the base plate, or from the angle iron 2O toward the boiler 10. Bolts 33 are mounted in the slots 32 and have countersunk heads in the lower surface of the base plate for retaining the bolts from lifting out of the slots and permitting` the free movement of the bolts throughout the length of the slots. The bolts 33 project upwardly through ears 34 of a housing or bearing 35, the ears 34 beingprovided with similarly arranged slots 36 for admitting adjustment of the casing upon the base plate. As the base plate has the slots 32 and as the ears have the slots 36, it will be understood that an adjustment may be had not only throughout the length of one pair of slots but also throughout the length of the second pair of slots. The lengths of the base plate and the casing may, therefore, be utilized for making a substantial adjustment of the casing toward and from the front of the boiler.

The casing 35 is of any suitable exterior configuration and is provided with a longitudinal bore or opening adapted to receive a hub or drum 37 and having at its central portion an annular way or passage 38 extending entirely around the drum 37 and in communication with an inlet pipe 39 for fluid under pressure. The drum 37 is hollow and open at one end into which is threaded a nipple 40 of an elbow 41 which carries a radially extending tubular arm 42 in the outer side of which are positioned a suitable number of nozzles 43. The arm 42 communicates through the elbow 41 with the interior of the drum or hub 37, and the latter communicates with the annularl passage 38 through slots 44 formed in the pe ripheral wall of the drum or hub. As shown in Figures 3, 5 and 6, the slots 44 are formed substantially V-shape with the apices of the slots extending circumferentially.

rlhe hub 37 is provided with a shaft 47 at its closed end, which is held in place by a transverse pin 48, and which carries a wheel 49 on its outer end receiving a chain 50 thereon for turning the wheel 49 by drawing on the chain. The casing 35 is provided in Aits opposite ends with annular recesses or counterbores 51 in which are mounted cones for receiving balls 52 which engage cones 53 on opposite ends of the hub 37, the cones and hub 37 being held within the cas ing 35 by heads or cap plates 54 bolted or otherwise suitably secured to the opposite ends of the casing. The hub 37 is thus mounted on the bearings 52 for facilitating turning of the hub, and suitable packing is placed at opposite ends of the hub to prevent escape of fluid from the channel 38.

rlie swinging or pivoted arm 42 is counterbalanced by a. weight 56 adjustably mounted on a rod 57, which extends from the elbow 41 in a direction diametrically opposite to the arm 42.

It is thought the operation will be apparent, for when it is desired to clean the flues 11 of the boiler, the fluid under pressure is admitted through pipe 39 to the annular passage 38 of the casing 35. The chain 50 is now pulled to turn the wheel 49 in a direction to carry the pockets 45 downwardly at one side of the drum. Rotation thus effected causes the arm 42 to sweep successively past the several tubes 11, and the fluid in the passage 38 freely flows through the slots 44 to the interior of the drum, through the elbow 41, into the arm 42, and is projected in jets from the nozzles 43 into the flues 11.

l/Vhen it is desired to gain access to the front of the boiler 10, and the boiler blower is found to be in the way, it is only necessary to raise the pin 29 out of the ledge 25 and draw the bracket outwardly, swinging the bracket upon the pintle 15. The latch plate 26 being free to turn, it is thrown out into the position shown in dotted lines in Figure 7 and the bracket may be swung to any desired extent upon the pivot 15 from in front of the boiler. In returning the boiler blower to operative position. it is only necessary to push the same toward the strap 14 and bring the latch plate 2G into register with the outer edge of the plate 21. The plate 21 strikes the curved rest 24 and is elevated or raised into position thereon, the latch plate 23 swinging about its pivot 2 7 into closed position. The locking pin 29 is now dropped into place to hold the latch plate from accidental displacement.

What I claim is 1. In a boiler blower. a casing to receive fluid under pressure, a rotatable member mounted in the casing and communicating therewith and having a distributing arm adapted to traverse the fines of the boiler.y a base plate supporting the casing in front of the boiler, said casing and said base plate having registering longitudinal slots therein. and claniping bolts arranged in the slots of the base plate and casing for securing the casing to the base plate in various adjusted positions throughout the lengths of said slots and maintaining the distributing arm in proper spaced relation to the front of the boiler.

2. In a boiler blower', a base plate adapted to be mounted in front of a boiler, a distributing member mounted for rotation in the casing and adapted to sweep the front of the boiler, a casing slidably mounted on the base plate, a longitudinal slot in the base plate, a longitudinal slot in the casing, and a bolt engaging through both of said slots for securing the casing on the base plate in various adjusted positions throughout the lengths of both of said slots and for maintaining the distributing member in properly spaced relation from the front of the boiler.

3. In a boiler blower, a bracket adapted to be mounted in front of a boiler, a base plate secured to the racket, a fluid distributing casing slidably mounted on the base plate, a sweep arm pivoted in the casing for traversing the flues of the boiler, said base plate provided at opposite ends with a pair of longitudinal slots and the casing provided at opposite ends with a second pair of longitudinal slots adapted to register with the first pair of slots, and clamping bolts secured through both pairs of slots for binding the casing in adjusted positions throughout the A lengths of both pairs of slots and for maintaining the sweep arm in adjustably spaced relation from the boiler.

4. In a boiler blower, the combination of a fluid distributing casing a sweep arm pivoted in the casing adapted to traverse the fines of the boiler, a bracket adjustably secured to the casing for adjustably maintaining the sweep arm in properly spaced relation to the front of the boiler, means for hinging one end of the bracket to one side of a furnace wall, a strap plate secured to the other side of the furnace wall and having a rest adapted to receive the free end of the bracket for supporting the casing in working position, a pivoted latch mounted on said strap for engaging the free end of the bracket when on the rest, and means for locking the latch in engaging position.

5. In a boiler blower, the'combination of a fluid distributing casing, a bracket for supporting the casing, a hinge connecting the bracket at one end to one side of a furnace wall, a rest at the other side of the furnace wall for the free end of the bracket, and means for locking the bracket with its free end upon said rest.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES A. I-IAFER.

Witnesses:

H. B. MGNULTY, CHAs. A. DAUFELT, Y 

